Cheapest priced copy (Modern Horizons 3): $0.49 at Card Kingdom, near mint, their price list as of .
Fangs of Kalonia 
Sorcery · Uncommon · Modern Horizons 3 · #153
Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on each creature that had a +1/+1 counter put on it this way.
Overload {4}{G}{G} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 3 | 153 | Uncommon | $0.49 | $0.79 |
| The List | MH3-153 | Uncommon | — | — |
5 rulings from Wizards of the Coast
- 7 June 2024If you are instructed to cast a spell with overload "without paying its mana cost," you can't choose to pay its overload cost instead.
- 7 June 2024To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as an overload cost), add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
- 7 June 2024If you don't pay the overload cost of a spell with overload, that spell will have a single target. If you pay the overload cost, the spell won't have any targets.
- 7 June 2024To double the number of +1/+1 counters on a creature, put a number of +1/+1 counters on it equal to the number it already has. Other cards that interact with putting counters on it will interact with this effect accordingly.
- 7 June 2024Because a spell with overload doesn't target when its overload cost is paid, it may affect permanents with hexproof or with protection from the appropriate color.